31542135523 has 2 divisors, whose sum is σ = 31542135524. Its totient is φ = 31542135522.

The previous prime is 31542135509. The next prime is 31542135551. The reversal of 31542135523 is 32553124513.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31542135523 - 2²⁹ = 31005264611 is a prime.

It is not a weakly prime, because it can be changed into another prime (31542139523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771067761 + 15771067762.

It is an arithmetic number, because the mean of its divisors is an integer number (15771067762).

Almost surely, 2^31542135523 is an apocalyptic number.

31542135523 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542135523 is an equidigital number, since it uses as much as digits as its factorization.

31542135523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54000, while the sum is 34.

The spelling of 31542135523 in words is "thirty-one billion, five hundred forty-two million, one hundred thirty-five thousand, five hundred twenty-three".